Hmmmm you are flying out of 2 hubs with no access to the "home" carrier. That's going to be tricky.

Any other asian airlines you can use? I would think your chances are higher out of HKG as HKG/TPE/NRT are the usual transit points for US/north america bound flights.

I'm not sure what your ticketing problem is but mine is that the E-tickets system are still not connected. So I'm still using paper for CX.